JP2001089969A - Sustainedly hydrophilic fiber and textile form using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a thermoplastic resin fiber having excellent antistaticity as well as sustainedly hydrophilicity having been a problem in the conventional relevant technology, and to obtain a textile form using the above fiber. SOLUTION: This fiber or textile form using the fiber is obtained by applying thereto 0.1-1.0 wt.% of a finishing agent containing >= 60 wt.% of a mixture containing 20-40 wt.% of a specific polyglycerol fatty acid ester and 5-20 wt.% of a specific polyoxyalkylene-modified silicone.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a durable hydrophilic fiber having antistatic properties and flexibility, which is obtained by adhering a fiber treatment agent having a specific composition to a fiber made of a hydrophobic thermoplastic resin. The present invention relates to a fiber molded body using the fiber. More specifically, the present invention relates to a durable hydrophilic fiber useful as a surface material that comes into contact with the skin in sanitary articles such as disposable diapers and sanitary napkins, an industrial or medical wiping cloth, and a fiber molded article using the same.

[0002]

2. Description of the Related Art The amount of fiber molded articles represented by nonwoven fabrics has been increasing all over the world. In particular, the proportion of polyolefin fibers and polyester fibers accounts for disposable diapers, sanitary napkins and wipers. It has been increasing year by year due to the spread of products. In the field of disposable products, the nature of the product, which is used once, requires cost competitiveness and differentiation from other products, and the performance required for fibers and nonwoven fabric used in these products is nonwoven fabric. Antistatic properties for high-speed production and durable hydrophilicity for differentiation from other products are particularly important.

[0003] Polyolefin fibers having strong hydrophobicity,
As a method for imparting antistatic property and durable hydrophilicity to polyester fibers, the following methods are generally known. 1) Application of a fiber treatment agent. 2) Fiber using a raw material resin to which a hydrophilic polymer resin is added. 3) Introduction of hydrophilic groups to the fiber surface by sulfonation treatment, plasma treatment, corona discharge treatment and the like.

[0004] The method 1) is the method most commonly used for hydrophilic fibers used in disposable products. For example, Japanese Patent Application Laid-Open No. 9-49166 proposes a fiber provided with durable hydrophilicity by attaching a small amount of a fiber treating agent to the fiber surface. However, although the fiber treating agent disclosed herein can impart a certain degree of durable hydrophilicity to the fiber, this level of durable hydrophilicity is no longer able to satisfy market requirements.

[0005] Regarding the method 2), at present, high durability hydrophilicity is not obtained, and at the same time, there is a problem in terms of cost when used as a disposable product.

[0006] In the method 3), good hydrophilicity can be obtained immediately after the fiber is subjected to the treatment described above, but the hydrophilicity decreases due to the temporal change of the hydrophilic group introduced on the fiber surface. There's a problem.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a thermoplastic resin fiber having a durable hydrophilic property and an excellent antistatic property, which is a problem of the prior art, and a fiber molded article using the same. To provide.

[0008]

Means for Solving the Problems The present inventors have made intensive studies to solve the above problems. As a result, when a fiber treatment agent containing a specific amount of a mixture obtained by mixing a specific component with a specific composition has a durable hydrophilic property when attached to a thermoplastic resin fiber surface or a fiber molded product, it has excellent antistatic properties. The present invention has been found to be a fiber or a fiber molded body having the following, and based on this finding, the present invention has been completed.

The present invention has the following configuration. (1) The following component (A) is added to a fiber made of a thermoplastic resin.
A fiber treatment agent containing 60% by weight or more of a mixture containing (B), (C), (D), and (E) in the following composition is applied in an amount of 0.1 to 1.0% by weight based on the weight of the fiber. Durable hydrophilic fiber. (A) 20 to 40% by weight of a polyglycerin fatty acid ester represented by the following general formula A with respect to the total of (A) to (E), (However, R ¹ is an alkyl group or alkenyl group having 7 to 21 carbon atoms, R ² and R ³ are H, an alkanoyl group or alkenoyl group having 8 to 22 carbon atoms, and a is an integer of 5 to 15). (B) A polyoxyalkylene-modified silicone represented by the following general formula B is used in an amount of 5 to 2 with respect to the total of (A) to (E).
0% by weight, (However, R ⁴ is H, an alkyl group having 1 to 12 carbon atoms, R ⁵
Is CH ₃ or C ₃ H ₆ O (C ₂ H ₄ O) _d (C ₃ H ₆ O)
_e R ⁴ , b is an integer of 3 to 15, c is an integer of 10 to 120,
d is an integer of 5 to 100, e is an integer of 5 to 100, and d +
e is an integer of 105 or less). (C) An alkyl imidazolium alkyl sulfate represented by the following general formula C is used in an amount of 10 to 25% by weight based on the total amount of (A) to (E), (However, R ⁶ is an alkyl group having ^{7 to} 21 carbon atoms, and R ⁷ is a methyl group or an ethyl group). (D) 5 to 20% by weight of an alkylene oxide adduct of an alkanoylamide represented by the following general formula D with respect to the total of (A) to (E), (However, R ⁸ is an alkyl group having 7 to 21 carbon atoms, R ⁹ is an alkylene unit having 2 to 4 carbon atoms, and f is an integer of 5 to 30). (E) 25 to 40% by weight of a polyetherester represented by the following general formula E, based on the total of (A) to (E): (R ¹⁰ is a residue of a monovalent to hexavalent aliphatic hydroxy compound, R ¹¹
Is a polyether polyester block represented by the general formula F or G, R ¹² is H, an alkanoyl group having 2 to 18 carbon atoms or an alkenoyl group having 16 to 22 carbon atoms). General formula F: General formula G: (In the general formulas F and G, R ¹³ is an alkylene unit having 2 to 4 carbon atoms, R ¹⁴ is an alkylene unit having 2 to 12 carbon atoms, m and n are each an integer of 1 or more, and g 1 to g m are each an integer. Where g = g1 + g2 +... + Gm is 5 to 200, h1 to hn
Are integers, and h = h1 + h2 +.
200, g ≧ h).

(2) The durable hydrophilic fiber according to the above (1), wherein the fiber is a conjugate fiber obtained by combining at least two kinds of thermoplastic resins.

(3) The durable hydrophilic fiber according to any one of the above (1) or (2), wherein at least one component of the thermoplastic resin constituting the fiber is a polyolefin resin. (4) At least one of the thermoplastic resins constituting the fiber
3. The durable hydrophilic fiber according to any one of the above items 1 or 2, wherein the component is a polyester resin. (5) A fiber molded product comprising the durable hydrophilic fiber according to any one of (1) to (4).

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
Examples of the fiber made of the thermoplastic resin according to the present invention include those made of a thermoplastic resin such as a polyolefin resin, a polyester resin, and a polyamide resin.
When used as a surface material in the field of sanitary materials, fibers made of a thermoplastic resin such as a hydrophobic polyolefin resin or a polyester resin are preferred from the viewpoint of dry touch properties.

Here, the polyolefin resin refers to an ethylene homopolymer, a propylene homopolymer, an α-olefin copolymer composed of ethylene or propylene and another α-olefin, a mixture of one or more of these, and the like. Specific examples of the .alpha.-olefin copolymer include binary copolymers and ternary copolymers mainly composed of propylene and copolymerized with ethylene, butene-1, 4-methylpentene-1, and the like, and mixtures thereof. And the like. As the polyester resin, polyethylene terephthalate, polybutylene terephthalate, poly (ethylene terephthalate-c
o-ethylene isophthalate) and copolymerized polyetheresters, and mixtures thereof. Depending on the application, a polyester resin or a mixture of a polyamide resin and a polyolefin resin may be appropriately selected.

When the durable hydrophilic fiber of the present invention is a composite fiber comprising two or more kinds of thermoplastic resins, the thermoplastic resin used may be a combination of polyethylene / polypropylene, polyethylene / α-olefin copolymer,
α-olefin copolymer / polypropylene, polyethylene / polyester, etc. can be exemplified, and depending on the use, a copolyester resin or polyamide resin can be appropriately selected and used as a raw material of the durable hydrophilic fiber of the present invention. it can.

The raw material resin used in the durable hydrophilic fiber of the present invention may contain a pigment, an antistatic agent, a flame retardant, an antibacterial agent, etc., as long as the object of the present invention is not hindered. At times, these additives may be mixed.

The cross-sectional shape of the durable hydrophilic fiber of the present invention is not particularly limited, and both the monocomponent fiber and the conjugate fiber may have any shape such as a circular or irregular shape. The composite form can be any form. For example, the fiber is a composite fiber,
When the cross section is circular, the composite form of the fibers can be any composite form such as a parallel type, a sheath-core type, and an eccentric sheath-core type. Further, in either case of the monocomponent fiber or the conjugate fiber, the cross-sectional shape of the fiber can be any shape, for example, a flat shape, a polygonal shape such as a triangular to octagonal shape, T
A letter shape, a hollow cross section type, a multi-leaf type and the like can be exemplified.

The single-filament fineness of the durable hydrophilic fiber of the present invention is not particularly limited. However, when used for sanitary materials, flexibility and texture are required. Is particularly preferably 10 denier or less, more preferably 8 denier or less. The form of the fiber may be any form such as a short fiber, a long fiber, and the presence or absence of a crimp, and the form may be appropriately selected according to the use.

Next, each component constituting the fiber treatment agent used in the present invention will be described. The component (A) constituting the fiber treating agent is a polyglycerin fatty acid ester represented by the general formula A, and is an effective component for improving durability and hydrophilicity. The polyglycerin fatty acid ester used in the present invention may be one in which some or all of the hydroxyl groups in the polyglycerin block are esterified, but the esterification rate of the hydroxyl groups is 10 to 60%, preferably 15 to 60%.
Preferably it is in the range of 50%.

The above polyglycerin fatty acid ester represents
R in the general formula (A)¹Is a C7-21, preferably charcoal
An alkyl or alkenyl group having a prime number of 12 to 19;
You. R ¹When the carbon number is 6 or less, the durable hydrophilic property is
If the number of carbon atoms is 22 or more, the initial hydrophilicity decreases.
You. R^Two, R^ThreeIs H, carbon number 8-22, preferably carbon number
13-20 alkanoyl groups or alkenoyl groups
You. R^Two, R^ThreeDurable hydrophilic if the carbon number is 7 or less
When the number of carbon atoms is 23 or more, the initial hydrophilicity is low.
Down. Glycerol, which forms the polyglycerin moiety,
The condensation degree a of the compound is 5 to 15, preferably 6 to 10.
When the degree of condensation a is 4 or less, a decrease in initial hydrophilicity occurs,
If the degree a is 16 or more, the durable hydrophilicity decreases.

The component (B) constituting the fiber treating agent used in the present invention is a polyoxyalkylene-modified silicone represented by the general formula B. In the present invention, it is effective for improving the durability and hydrophilicity, and at the same time, it is effective for improving the initial hydrophilicity. Has the role of improving In order to provide the polyoxyalkylene-modified silicone with minimum water solubility and to obtain good initial hydrophilicity and durable hydrophilicity, b in the general formula B needs to be 3 to 15. When b is 2 or less, the initial hydrophilicity decreases, and when b is 16 or more, the water solubility of the polyoxyalkylene-modified silicone becomes too large, and the durability hydrophilicity becomes insufficient.

For the same reason, the ranges of c, d and e in the general formula B are also limited. First, for c, 10
Preferably it is ~ 120. When c is 9 or less, the durable hydrophilicity decreases, and when c is 121 or more, the initial hydrophilicity decreases. When d is 4 or less, the initial hydrophilicity decreases, and when d is 101 or more, durable hydrophilicity is insufficient, so that d is preferably in the range of 5 to 100. Insufficient hydrophilicity, 10
If it is 1 or more, the initial hydrophilicity decreases, so that it is preferably in the range of 5 to 100. In order to achieve both initial hydrophilicity and durable hydrophilicity, d + e needs to be 105 or less.

When the carbon number of R ⁴ is more than 12, the initial hydrophilicity of the durable hydrophilic fiber is reduced.

The component (C) of the fiber treating agent is an alkyl imidazolium alkyl sulfate represented by the general formula C and has an excellent antistatic effect. In the general formula C, R ⁶ has 7 to 21 carbon atoms, preferably 15 to carbon atoms.
19 alkyl groups. When the carbon number is 6 or less, the durability and hydrophilicity decrease, and when the carbon number is 22 or more, the antistatic property decreases. R ⁷ is a methyl group or an ethyl group, and can be suitably used in any case in the present invention.

The component (D) of the fiber treating agent is an alkylene oxide adduct of an alkanoylamide represented by the general formula D, and has a role of improving the durability and hydrophilicity. In the general formula D, R ⁸ is an alkyl group having 7 to 21 carbon atoms, preferably 15 to 19 carbon atoms. When the number of carbon atoms in R ⁸ is 6 or less, the durable hydrophilicity decreases, and when it is 22 or more, the initial hydrophilicity decreases. R ⁹ is an alkylene unit having 2 to 4 carbon atoms. Further, when f in the formula is 4 or less, the initial hydrophilicity decreases, and when it is 31 or more, the durable hydrophilicity decreases.
f needs to be 5 to 30. Further, from the viewpoint of the initial hydrophilicity, those having an ethylene group of 50 mol% or more in the polyether block enclosed by f in the general formula (D) are preferable.

The component (E) of the fiber treating agent is represented by the general formula E
And is effective in improving durability and hydrophilicity. R ¹⁰ in the above general formula E is a residue of a monovalent to hexavalent aliphatic hydroxy compound. Examples of the monovalent to hexavalent aliphatic hydroxy compound include a monovalent to hexavalent aliphatic alcohol,
Polyhydric alcohol partial ester obtained from divalent to hexavalent aliphatic alcohol and aliphatic monocarboxylic acid having 6 to 18 carbon atoms, hydroxycarboxylic acid having 1 to 5 hydroxyl groups in the molecule, 1 to 5 hydroxyl groups in the molecule 1- to 6-valent aliphatic hydroxy compounds such as alkanolamines having 3 carbon atoms, alkyl dialkanolamines and dialkylalkanolamines each having an alkyl group having 1 to 18 carbon atoms, and alkoxylated polyamines having 1 to 5 hydroxyl groups in the molecule. And the like.

R ¹¹ in the general formula E comprises an alkylene unit having 2 to 4 carbon atoms represented by R ¹³ and an alkylene unit having 2 to 12 carbon atoms represented by R ¹⁴ in the above general formulas F and G. It is a polyether polyester block composed of a polyether block and a polyester block. Also, R
¹⁴ is an alkylene unit having 2 to 12 carbon atoms, preferably 2 to 8 carbon atoms. Durable hydrophilic property is lowered if the number of carbon atoms in R ¹⁴ is 1, the initial hydrophilicity is lowered exceeds 12.

In the present invention, 1) a polyether polyester block copolymer in which a polyether block and a polyester block are bonded in order to a monovalent to hexavalent aliphatic hydroxy compound (ie, in the general formula F, m =
1, a case where n = 1) 2) a polyether polyester block copolymer in which a polyester block and a polyether block are sequentially bonded to a monovalent to hexavalent aliphatic hydroxy compound (that is, in general formula G, m = 1,
3) a polyether polyester block copolymer in which a plurality of polyether blocks and polyester blocks are alternately bonded to a monovalent to hexavalent aliphatic hydroxy compound (that is, in the general formula F, m ≧
2 and m = n or m = n + 1), 4) 1
Polyether polyester block copolymer in which a plurality of polyester blocks and polyether blocks are alternately bonded to a hexavalent aliphatic hydroxy compound (that is, in general formula G, n ≧ 2 and n = m or n = m +
1) can be used, but the polyether polyester block copolymer of 1) can be most preferably used in the present invention.

Further, in the present invention, the total number of R ¹³ representing an alkylene group having 2 to 4 carbon atoms per hydroxyl group of an aliphatic hydroxy compound residue in the polyether polyester block copolymer g = g1 + g2 +. + Gm is 5
At the same time as 200, it is preferred that 40% or more of the alkylene groups corresponding to R ¹³ are ethylene groups. Also, the total number h of R ¹⁴ contained in all the polyester blocks.
.. + Hn is from 5 to 200, and it is preferable that g ≧ h.

R ¹² is hydrogen, an alkanoyl group having 2 to 18 carbon atoms or an alkenoyl group having 16 to 22 carbon atoms. An alkanoyl group having 2 to 18 carbon atoms or an alkenoyl group having 16 to 22 carbon atoms may be used when the polyetherester used in the present invention is a copolymer of the above 1).
And in 3) and 4) above, when a polyester block is bonded to the terminal of the molecule corresponding to R ¹¹ ,
It can be introduced by reacting an acylating agent with a hydroxyl group present at the polyester block terminal. Such an acylated polyether polyester block copolymer can also be used in the present invention.

The reason why the fiber treating agent used in the present invention can be preferably used is that an alkyl imidazolium alkyl sulfate and an alkylene oxide adduct of alkanoylamide are used in combination. Imidazoline surfactants, which are cationic surfactants, have excellent antistatic properties. Some anionic surfactants have excellent antistatic properties, but when such surfactants are added to the surfactant, the durable hydrophilicity may be significantly reduced. Such a phenomenon is not observed in the imidazoline-type surfactant, and the durable hydrophilicity of the fiber treating agent used in the present invention can be significantly improved by using an alkylene oxide adduct of alkalolamide in combination. It has become possible.

The durable hydrophilic fiber of the present invention and the fiber molded article using the fiber are prepared by adding a fiber treating agent comprising the above-mentioned components to the fiber by weight or 0.1% by weight of the fiber molded article.
-1% by weight. If the adhesion amount is less than 0.1% by weight, not only the durable hydrophilicity, which is the object of the present invention, but also the antistatic property cannot be imparted. It is easy to get up. Further, even when the amount of adhesion exceeds 1% by weight, the rate of improvement in durability is reduced and at the same time, card scum is easily generated. The adhesion amount of the fiber treatment agent is preferably 0.2 to 0.7% by weight.

As described above, the fiber treating agent used in the durable hydrophilic fiber of the present invention has at least 60% by weight of the total of the components (A) to (E) in the fiber treating agent. ) To (E), the range of each component is determined for the following reasons. First, the content of the component (A) polyglycerin fatty acid ester was 20% with respect to the sum of (A) to (E).
-40% by weight, preferably 30-35% by weight. If the composition ratio of the polyglycerin fatty acid ester is less than 20% by weight, durability hydrophilicity cannot be obtained, and if it exceeds 40% by weight, the initial hydrophilicity decreases.

The content of the component (B) polyoxyalkylene-modified silicone is 5 to 5% based on the total of (A) to (E).
It is 20% by weight, preferably 10 to 15% by weight. If the polyoxyalkylene-modified silicone is less than 5% by weight, the initial hydrophilicity cannot be obtained, and if it exceeds 20% by weight, the durable hydrophilicity decreases.

The content of the component (C) alkyl imidazolium alkyl sulfate is from 10 to 25% by weight, preferably from 15 to 20%, based on the total of (A) to (E). When the content of the alkyl imidazolium alkyl sulfate is less than 10% by weight, the antistatic property is reduced, and when the content is more than 25% by weight, the durable hydrophilicity is reduced.

The content of the alkylene oxide adduct of the component (D) alkanoylamide is 5 to 20% by weight, preferably 10 to 15% by weight, based on the total of (A) to (E).
It is. If the alkylene oxide adduct of the alkanoylamide is less than 5% by weight, the durable hydrophilicity decreases, and if it exceeds 20% by weight, the initial hydrophilicity decreases.

The content of the component (E) polyether polyester is from 25 to 40% by weight, preferably from 30 to 35% by weight, based on the total of (A) to (E). If the polyetherester content is less than 25% by weight, the durable hydrophilicity decreases, and
If it exceeds 0% by weight, the initial hydrophilicity decreases.

In the fiber treating agent used in the present invention,
The fiber treating agent comprising the components (A) to (E) can be used by mixing other components within a range not to impair the purpose of the present invention. In this case, the components (A) to (E) Is required to be 60% by weight or more based on the fiber treatment agent. Examples of components that can be used in combination by mixing with the fiber treating agent used in the present invention include, for example, polyhydric alcohol esters such as sorbitan ester monooleate and glycerin ester monostearate, and alkylene oxides such as ethylene oxide and propylene oxide. Examples thereof include polyethers and the like, which can be used as a mixture of two or more. Further, a surfactant having a role of an emulsifier, a leveling agent, or the like can be contained.

The method for adhering the above-mentioned fiber treating agent to the thermoplastic fiber is not particularly limited. The spinning or drawing step involves contact with an oiling roll (contact method), dipping into a dipping layer (dipping method), and spraying. Spray adhesion (spray method)
Alternatively, a known method such as a method in which a fiber laminate such as a web or a fiber molded body such as a nonwoven fabric is processed and then adhered by a contact method, a dipping method, or a spray method can be used.

Next, the behavior of the fiber treatment agent on the fiber surface when the conventional fiber treatment agent and the fiber treatment agent used in the present invention are used by using the splittable conjugate fiber will be described. Usually, for a radial splitting conjugate fiber composed of a hydrophobic thermoplastic resin, for example, in a nonwoven fabric forming step by high-pressure water flow, a hydrophilic fiber treating agent that has adhered to the fiber surface as a fiber finish is quickly washed away. . Since these fibers themselves have extremely strong hydrophobicity, the fibers avoid the water flow in the initial stage of the nonwoven fabric formation process by the high-pressure water flow, and cannot receive the impact energy of water uniformly. Therefore, unless the number of stages of the high-pressure water flow is increased, a nonwoven fabric containing ultrafine fibers sufficiently uniformly divided cannot be obtained.

On the other hand, in the radial splitting conjugate fiber having the fiber treatment agent used in the present invention adhered to the surface, the fiber itself has extremely strong hydrophobicity, but the fiber treatment agent adhered to the fiber surface is very loosely dispersed. Therefore, even if repeated nonwoven fabric processing by high-pressure water flow is repeated, the fibers receive the impact energy of water evenly even when repeated non-woven fabric processing by high pressure water flow Has the characteristic that a nonwoven fabric containing the same can be obtained.

In the durable hydrophilic fiber of the present invention, since the elution of the fiber treating agent in water is very slow in a wet process such as papermaking, a fiber using a hydrophobic resin such as a polyolefin resin is used. Even with this, the hydrophilicity of the fiber is maintained and the dispersion retention in water is excellent.

The durable hydrophilic fiber of the present invention can be processed into a fiber molded body by a known method. The fiber molded body referred to in the present invention is, for example, a woven fabric, a knitted fabric, a nonwoven fabric or a nonwoven fiber aggregate. Further, fibers mixed by a method such as cotton blending, blending, blending, twisting, knitting and weaving can be made into a cloth form by the above-described method. Further, the fiber molded article using the durable hydrophilic fiber of the present invention may be used alone, or may be used in a state of being laminated or integrated with other non-woven fabric, knitted fabric, mesh-like material, film, molded product and the like. You may.

The fiber molding can be produced by a known method.
For example, after a short fiber is formed into a fiber laminate by a dry method or a wet method, a heating roll or ultrasonic pressure bonding, fusion with heated air, a method of obtaining a nonwoven fabric by fiber entanglement with a high-pressure water flow or a needle, and a spun yarn, continuous There is a method of forming a knitted fabric by knitting and weaving using a yarn or the like. Also,
Achieving the object of the present invention by attaching the fiber treating agent to a non-woven fabric once obtained, for example, a non-woven fabric according to the above method or a non-woven fabric obtained by a spun bond method, a melt blow method, a flash spinning method or the like. Can be.

Further, among the durable hydrophilic fibers of the present invention,
By cutting the composite fiber whose cross-sectional shape is parallel type, sheath-core type, radial split type and sea-island arrangement type, mixing it with water-absorbing material such as pulp and polymer water-absorbing resin, and heat-treating it, the shape retention property of the absorber is maintained Can be provided. In addition, general thermoplastic conjugate fibers reduce the water absorption performance of the absorbent depending on the cotton mixing ratio, but the durable hydrophilic fiber of the present invention hardly shows a decrease in water absorption performance because the hydrophilicity is maintained.

The durable hydrophilic fiber and fiber molded article of the present invention having the above-mentioned constitution are used for surface materials in the field of sanitary products, shape-retaining materials for absorbents, wiping cloths for medical or industrial use, absorbent pads, and construction in the field of civil engineering and architecture. It can be used in a wide range of fields such as structural reinforcing fibers, liquid transport membranes, water pipes, and water permeable sheets.

[0046]

The present invention will be described in more detail with reference to the following Examples, which should not be construed as limiting the scope of the invention. In addition, the evaluation method and reference | standard in each example are as follows.

(1) Antistatic property: 40 g of a sample fiber was placed at 20 ° C.
The web was formed with a miniature card at a speed of 7 m / min under the condition of a relative humidity of 45%, the voltage of static electricity generated on the web was measured, and the antistatic property was evaluated according to the following criteria. It was determined that there was no practical problem if the voltage was less than 100V. ：: less than 100 V △: 100 V or more and less than 500 V ×: 500 V or more

(2) Card passability: 40 g of the sample fiber was 3
At a temperature of 0 ° C. and a relative humidity of 80%, the miniature card was stopped when processing the web with the miniature card at a speed of 7 m / min, and the condition of the fiber on the cylinder was evaluated according to the following criteria. The index was used. ○: No winding △: Partial winding occurred ×: Almost all winding occurred

(3) Web condition: The condition of the web produced by the above method was observed and evaluated according to the following criteria. ：: Tensile and uniform without nep △: Partially generated nep ×: Non-uniform without stretch of web ×: Cotton fall or breakage of web occurs 評 価 Evaluation of XX The subsequent measurement was stopped for the sample obtained with.

(4) Hydrophilicity of raw cotton: 40 g of sample fiber
The web was sampled with a miniature card at a speed of 7 m / min at 0 ° C. and a relative humidity of 80%. 5 g of this web was weighed, packed in a copper wire basket of 3 cm in diameter, 8 cm in length and 3 g in weight, dropped in water from a place of 25 cm in the water tank and 1 cm in height above the water surface. The time until completely submerged was measured. The sedimented sample was immediately taken out of the water, centrifugally dehydrated, air-dried at room temperature for 24 hours, and the sedimentation time was measured in the same manner. This measurement was repeated three times for the same sample.

(5) Durable hydrophilicity of nonwoven fabric: 30 g / basis weight
The nonwoven fabric of m ² was cut into a piece of 10 × 10 cm, the surface material was peeled off, the absorbent was overlaid on a commercially available disposable diaper, and a cylindrical pipe having an inner diameter of 6 cm was placed thereon. Then, 65 ml of artificial urine was injected into the pipe, and absorbed through a nonwoven fabric into an absorbent for a disposable diaper. After injecting artificial urine for 3 minutes, the nonwoven fabric was sandwiched between two upper and lower filter papers (Toyo Filter Paper No. 50), and 10 × 10 c
m and a 3.5 kg weight were placed thereon and left for 3 minutes to dehydrate. After that, the sample was air-dried for further 5 minutes, the non-woven fabric was placed on a filter paper (described above), and artificial urine permeated from a height of 1 cm above the non-woven fabric using a pipette with artificial urine adjusted to 23 ± 2 ° C in a thermostatic water bath. A total of 20 drops were dropped one by one while shifting the position in the inside. At this time, the number of droplets that disappeared from the surface of the nonwoven fabric within 10 seconds was counted. This measurement was repeated four times for the same sample, and used as an index for evaluating the durability and hydrophilicity of the nonwoven fabric.

(6) Tactile sensation: Ten panelists judged the tactile sensation of the nonwoven fabric based on the following criteria, and the tactile sensation was evaluated based on the number of panelists. ：: Good without sticky feeling ×: There is sticky feeling and some uncomfortable feeling. After the judgment, the following scores were given according to the number of persons. 4: 9 or more people with a circle 3: 6 or more and 8 or less with a circle 2: 3 or more and 5 or less with a circle 1: 2 or less with a circle

Examples 1 to 10 and Comparative Examples 1 to 8 i) polypropylene (propylene homopolymer of MFR 16 g / 10 min, denoted by i in the table), ii) high-density polyethylene (MFR 16 g / 10 min of ethylene single weight) Ii) spinning polyethylene terephthalate (IV value 0.67, described as iii in the table) alone or in combination of two components as described in the table, Monocomponent fibers (Example 3, Comparative Example 5) and sheath-core type composite fibers (Examples 1, 2, 4, 6, 8) described in Tables 1 to 3 described below.
-10, Comparative Examples 1-4, 6-8), split type conjugate fibers (Example 5) and side-by-side conjugate fibers (Example 7) having a fineness of 2 d / f. In all the composite fiber samples, the volume ratio of the two kinds of thermoplastic resins used was 50:50. Using these fibers, a fiber molded body was produced by the following processing method. A predetermined amount of a fiber treating agent having the composition shown in Tables 1 to 3 was applied to the obtained fibers and fiber moldings, based on the weight of the fibers or fiber moldings.

Here, in the table, the symbol representing the fiber molded body (processing method) indicates that the fiber molded body was produced by the following method. Processing method (a): Each fiber having various fiber treating agents having the compositions shown in Tables 1 to 3 was cut to a fiber length of 51 mm, dried, then formed into a card web by a miniature card machine, and then subjected to a suction dryer (processing). (Temperature: 138 ° C.) to give a through-air nonwoven fabric having a basis weight of about 30 g / m ² . Processing method (b): Each fiber to which various fiber treating agents having the compositions shown in Tables 1 to 3 were adhered was cut into a fiber length of 51 mm, dried, then made into a card web with a miniature card machine, and embossed roll (embossed roll). (Area area ratio 25%)
To give a nonwoven fabric with a basis weight of about 30 g / m ² . Processing method (c): emboss roll (emboss convex area ratio 1)
5%), and various fiber treating agents having the compositions shown in Tables 1 to 3 were attached to spunbond nonwoven fabrics having a basis weight of about 30 g / m ² and air-dried.

The performance of each of the thus obtained fiber sample and fiber molded product sample was evaluated by the above-described method. For the sample prepared by the processing method (c), the antistatic property of the fiber, the card passing property, the state of the web, the hydrophilicity of the raw cotton (fiber), etc. are not related to the performance of the oil agent or are measured. Not evaluated because it is not possible. In addition, those having a card formability evaluation of xx were not processed into a fiber molded body, and therefore, no test was performed on the fiber molded body. These results are shown in Tables 1 to 3, respectively.

Examples 1 to 6 shown in Table 1 correspond to components (A) to
The fiber treatment agent comprising (E) was attached to each fiber or fiber molded article (hereinafter, referred to as a sample) at 0.5% by weight to evaluate the performance.

Examples 7 to 10 shown in Table 2 correspond to the component (A)
Each of the fiber treatment agents of (E) to (E) is mixed with the fiber treatment agent of the present invention, and a fiber treatment agent to which 40% by weight or less of a surfactant (other composition) preferably added is attached to the sample (0. 5% by weight) to evaluate the performance. Comparative Examples 1 and 2 correspond to components (A) to (E), respectively.
The fiber treatment agent consisting of
The performance was evaluated by attaching 1.5% by weight.

Comparative Examples 3 to 7 shown in Table 3 show that the fiber treating agent used in the present invention does not contain any of the components (A) to (E), or the fiber treating agent does not contain any of the components. The performance was evaluated using a fiber treatment agent having a composition significantly deviating from the range specified in the invention. Comparative Example 8
Is an example implemented in accordance with the embodiment of JP-A-9-49166.

[0059]

[Table 1]

[0060]

[Table 2]

[0061]

[Table 3]

[0062]

Industrial Applicability The durable hydrophilic fiber of the present invention and a fiber molded article using the same are excellent in durable hydrophilicity and do not give a user an unpleasant feeling such as sticky feeling. When used as a surface material of a disposable diaper or a sanitary napkin or as a second sheet, a product that does not deteriorate in body fluid absorption performance even after prolonged use and maintains a good touch can be obtained.

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) C08L 71/00 C08L 71/00 Z 83/12 83/12 D06M 13/165 D06M 13/165 13/352 13/352 13 / 402 13/402 13/513 13/513 15/53 15/53 15/647 15/647 // D06M 101: 20 101: 20 101: 32 101: 32

Claims (5)

[Claims] 1. A fiber comprising a thermoplastic resin, the following components:
(A), (B), (C), (D) and (E) have the following composition
A fiber treatment agent containing at least 60% by weight of the mixture
Durable parent with 0.1-1.0% by weight based on fiber weight
Aqueous fiber. (A) Polyglycerin fatty acid ester represented by the following general formula A
Steal is 20 to 40 times the total of (A) to (E).
%, General formula A:(However, R¹Is an alkyl group having 7 to 21 carbon atoms or
Lucenyl group, R^Two, R^ThreeIs H, an alkano having 8 to 22 carbon atoms
An yl group or an alkenoyl group, a is an integer of 5 to 15). (B) a polyoxyalkylene derivative represented by the following general formula B
Water-soluble silicone in an amount of 5 to 2 with respect to the total of (A) to (E).
0% by weight,(However, R^FourIs H or alkyl having 1 to 12 carbons
Group, R^FiveIs CH_ThreeOr C_ThreeH ₆O (C_TwoH_FourO)_d(C_ThreeH₆
O)_eR^Four, B is an integer of 3 to 15, c is an integer of 10 to 120
Number, d is an integer of 5 to 100, e is an integer of 5 to 100,
d + e is an integer of 105 or less. (C) an alkyl imidazolium represented by the following general formula C
Alkyl sulfate is added to the sum of (A) to (E)
10 to 25% by weight, general formula C:(However, R⁶Is an alkyl group having 7 to 21 carbon atoms, R⁷Hame
A tyl group or an ethyl group). (D) an alkanoylamide represented by the following general formula D:
The alkylene oxide adduct was added to the sum of (A) to (E).
5 to 20% by weight, general formula D:(However, R⁸Is an alkyl group having 7 to 21 carbon atoms, R⁹Is charcoal
An alkylene unit having a prime number of 2 to 4, f is an integer of 5 to 30). (E) a polyetherester represented by the following general formula E
25 to 40% by weight based on the total of (A) to (E), general formula E:(R^TenIs a 1 to 6-valent aliphatic hydroxy compound residue, R¹¹
Is a polyether polyester represented by the general formula F or G
Rublock, R¹²Is H, alkanoyl having 2 to 18 carbon atoms
Or an alkenoyl group having 16 to 22 carbon atoms). General formula
F:General formula G:(In general formulas F and G, R¹³Is an alkylene unit having 2 to 4 carbon atoms
Rank, R¹⁴Is an alkylene unit having 2 to 12 carbon atoms, m and n are
G1 to gm are integers each of which is 1 or more;
G = g1 + g2 + ... + gm is 5 to 200, and h1 to hn is
Each of them is an integer, and h = h1 + h2 +.
An integer of 0, g ≧ h). 2. The durable hydrophilic fiber according to claim 1, wherein the fiber is a conjugate fiber obtained by combining at least two kinds of thermoplastic resins. 3. The durable hydrophilic fiber according to claim 1, wherein at least one component of the thermoplastic resin constituting the fiber is a polyolefin resin. 4. The durable hydrophilic fiber according to claim 1, wherein at least one component of the thermoplastic resin constituting the fiber is a polyester resin. 5. A fibrous molded article comprising the durable hydrophilic fiber according to any one of claims 1 to 4.